Is it possible to purchase a modern straight-block freewheel in 6 or 7 speed. Ideally i'd like something that had an 11 tooth small and was 7 speed but i'd settle for just about anything. Shimano still makes great freewheels (surprising) but I've only found them in alpine gearing. The prices for used freewheels on e-bay are outrageous even if i were willing to take a worn out piece of junk, and the NOS offerings are even more jaw-dropping. I'm not a cheapskate, but money is tight and it's hard to justify spending more than say $30 on a freewheel for a bike i bought for a hundred. Am i SOL?