Hi Nick, welcome to the list! You might try:
http://www.convertibleparts.com/ they have just about anything and everything for our verts. And if anyone would have these parts sold seperately, they should.

Give em a try, they are not usually the cheapest like Ames would be, but may have just what you need, and have the experience to help you out when needed.

Good luck,m and keep us posted!

Brett - 67 Drop Top 455!