what tank has knee dents that i can use?

[clean]

i have a 72 cb350 and was thinking about making knee dents, but i just got clip-ons and would have to make clip-on dents as well. i don't wanna lose that much room for gas, so what can i get for a tank that has knee dents and fit my 350 easily. i would really love a aluminium manx style tank, but i don't have the funds. any info would be nice. what would work for me? i've been searching ebay for old tanks, but nothing has come up

 

[Big R]

Any kind of aluminum or fiberglass tank is gonna be fairly expensive. Is that all you are worried about is the loss of fuel capacity? Knee dents don't take up that much space. I'd recommend getting a junk tank to practice on though