Unless you count the rain suit I made last year, I haven't made any bike clothing yet.
It's on my list, though. I don't see why you couldn't make your own stuff, all you really need is a serger and a pattern (to alter). And the courage to make a few mistakes.
As expensive as dedicated bike clothes are, it seems like a good idea, actually.
Give big space to the festive dog that make sport in the roadway. Avoid entanglement with your wheel spoke.
(Sign in Japan)
1978 Raleigh Gran Prix
2003 EZ Sport AX