8 Lug Disc Brake Conversion Kit

[BAMO]

Does anyone know if this exists for an 8 lug (c20) - http://www.performanceonline.com/196...ION-KIT-5-LUG/

It looks like it's just a bracket that mounts to the existing knuckle/spindle. I found some place that can make them - http://www.blackbirdscustomtrucks.com/- but I would need to send my knuckle and such to them for them work off of (and then the cost is likely higher and I'd might as well just get donor parts from the junkyard (spindle, tie rods ball joints...etc form a 73-87) and do the swap that way).

Thoughts or ideas (I've checked threads here and of course been googling away, so figured someone must have come across this if it exists).