That part is used in a number of different bikes. Its part # 24651-286-000, you can cross reference the part number on this site to see the models that used it - http://www.motogrid.com/pages/OemParts?aribrand=HOM. Very surprised to find its no longer available. Hopefully this model list will broaden your search and you can find one.
CB350 A MOTORCYCLE, JPN, VIN# CB350-1000001
CB350G A MOTORCYCLE, JPN, VIN# CB350-5000001
CB350K2 A MOTORCYCLE, JPN, VIN# CB350-2000001
CB350K3 A MOTORCYCLE, JPN, VIN# CB350-3000001
CB350K4 A MOTORCYCLE, JPN, VIN# CB350-4000001
CB400T A (80) MOTORCYCLE, JPN, VIN# NC03-2000001 TO NC03-2011626
CB400T A (81) MOTORCYCLE, JPN, VIN# JH2NC030-BM100001
CB400TI A (78) MOTORCYCLE, JPN, VIN# CB400T-2000022
CB400TI A (79) MOTORCYCLE, JPN, VIN# CB400T-2100006
CB400TII A (78) MOTORCYCLE, JPN, VIN# CB400T-4000048
CB400TII A (79) MOTORCYCLE, JPN, VIN# CB400T-4100006
CB450T A (82) MOTORCYCLE, JPN, VIN# JH2PC050-CM000001
CB500 A MOTORCYCLE, JPN, VIN# CB500-1000001
CB500K1 A MOTORCYCLE, JPN, VIN# CB500-2000001
CB500K2 A MOTORCYCLE, JPN, VIN# CB500-2100001
CB550 A MOTORCYCLE, JPN, VIN# CB550K-1000001
CB550F A MOTORCYCLE, JPN, VIN# CB550F-1109886
CB550F A (76) MOTORCYCLE, JPN, VIN# CB550F-2000003 TO CB550F-2010866
CB550F A (77) MOTORCYCLE, JPN, VIN# CB550F-2100001 TO CB550F-2114871
CB550K A (76) MOTORCYCLE, JPN, VIN# CB550K-1230001
CB550K A (77) MOTORCYCLE, JPN, VIN# CB550K-2000007 TO CB550K-2015308
CB550K A (78) MOTORCYCLE, JPN, VIN# CB550K-2100001 TO CB550K-2122082
CB550K1 A MOTORCYCLE, JPN, VIN# CB550K-1200001
CB650 A (79) MOTORCYCLE, JPN, VIN# RC03-2002472
CB650 A (80) MOTORCYCLE, JPN, VIN# RC05-2100002 TO RC05-2108005
CB650 A (81) MOTORCYCLE, JPN, VIN# JH2RC050-BM200001 TO JH2RC050-BM207746
CB650 A (82) MOTORCYCLE, JPN, VIN# JH2RC050-CM300003
CB650C A (80) MOTORCYCLE, JPN, VIN# RC05-2000008 TO RC05-2018218
CB650C A (81) MOTORCYCLE, JPN, VIN# JH2RC051-BM100001 TO JH2RC051-BM118458
CB650SC A (82) MOTORCYCLE, JPN, VIN# JH2RC080-CM000013 TO JH2RC080-CM019135
CL350 A MOTORCYCLE, JPN, VIN# CL350-1000001
CL350K2 A MOTORCYCLE, JPN, VIN# CL350-2000001
CL350K3 A MOTORCYCLE, JPN, VIN# CL350-3000001
CL350K4 A MOTORCYCLE, JPN, VIN# CL350-4000001
CL350K5 A MOTORCYCLE, JPN, VIN# CL350-5000001
CM400A A (79) MOTORCYCLE, JPN, VIN# NC02-2000001 TO NC02-2005965
CM400A A (80) MOTORCYCLE, JPN, VIN# NC02-2100001 TO NC02-2106459
CM400A A (81) MOTORCYCLE, JPN, VIN# JH2NC020-BM200001
CM450A A (82) MOTORCYCLE, JPN, VIN# JH2PC052-CM000001 TO JH2PC052-CM004281
CM450A A (83) MOTORCYCLE, JPN, VIN# JH2PC052-DM100001 TO JH2PC052-DM102003
CMX450C A (86) MOTORCYCLE, JPN, VIN# JH2PC170-GM000010 TO JH2PC170-GM012321
CMX450C A (87) MOTORCYCLE, JPN, VIN# JH2PC170-HM100001 TO JH2PC170-HM104034
CMX450C AC (86) MOTORCYCLE, JPN, VIN# JH2PC171-GM000007 TO JH2PC171-GM002098
CMX450C AC (87) MOTORCYCLE, JPN, VIN# JH2PC171-HM100001 TO JH2PC171-HM100972
SL350 A MOTORCYCLE, JPN, VIN# SL350-1000001
SL350K1 A MOTORCYCLE, JPN, VIN# SL350-2000001
SL350K2 A MOTORCYCLE, JPN, VIN# SL350-3000001