RChaloner
, I hope I'll be spared being called a teasing jerk, lol, I just want to forward a message of hope.
If you keep checking eBay, things come up at great prices from time to time. I managed to buy a perfectly solid tank and cover for $15 - there were no other bids!
The tank I had was really brittle where the cover window is, you could never see the fluid level and it would deteriorate anyway. So, I gave it a shot at repairing it. I cut off that damaged part and bonded a clear piece of acrylic in place with JB Weld. It looks fantastic under the cover, and I'll be using it on the bike for now. The other one off eBay I'm keeping for it's condition and stock originality. And it has a much nicer cup anyway, so I'm already using it.
Maybe yours is also salvageable? In the meantime, I will keep an eye on the sources and if I see a tank available I will let you know.