A Body Disc Brake Swap 101

Trying to find a couple grease boots for a 67 - 72 spindle. Have all the parts for the drum to disc brake change over, but can't find the MOOG grease boots, without spending almost $60.00 for new ball joints, each. OUCH!!!!! Any ideas?
https://www.moog-suspension-parts.com/universal-dust-boots.asp