KZ400 caliper rebuild

Hi, all. I have a '76 Z400 D3 w/ forks from a '78 B model. I have the dust seal OEM 43083-002. It's fluid seal 43049-004 I need. Badly. Impossible to find, apparently. Does anyone know of other applications for which fluid seal 43049-004 was used? Looks like it's also used in the '76 caliper. I'd seen a previous post on Do The Ton with someone asking about the possibility of a large lot-size run done somewhere. Does anyone have any info about that? Does anyone have any NOS they want to sell me? Does anyone have a working example of caliper OEM 43041-1003 they'd like to sell on? All useful info very much appreciated.