A body ball joint boots

Used the PST front end kit on my wifes Dart, and some of the boots are already split. Does anyone have a source, part number, ect for these. No one around me seems to carry them separately. Also, do they have to have the metal ring to lock them in place, or can you use the ones without? Thanks in advance.

http://www.energysuspensionparts.com/Energy-Suspension-Universal-Dust-Boots.asp

I look on there web site it looks like they don't have the metal on the bottom. Are they still good to use? I can't the parts store can get a whole ball joint a TRW or A MOOG but not the just the boot some one must make them, Thank You for any help you can give

I use them without issues on my cars.

Try BEA Parts, Mike sent me a set of stock reproductions that look outstanding!