Front Brake Caliper for 72 305sl
 

I have a 1972 350/450 sl VIN number 107.044 12-002459. My front right caliper is dragging. I obviously need to either rebuild it or replace it. it is a ATE brand. Rebuilding it myself looks to be a procedure that could be frustrating if not done correctly the first time ( Least expensive option). However I am willing to try if need be. If purchasing new or rebuilt I see I have several options as far as parts houses. Pelican (381.00), MBZ parts (292.00) , Bud's (350.00 to rebuild my caliper) or even Mercedes classic center ( $ unknown). Which route should I take? Which parts house should I choose? What other parts houses should I consider? Of course I will be replacing brake hoses, pads and pins as well. Any and all advice will be greatly appreciated.
Thanks

I'd replace with rebuilt and try autohausaz.com or ebay motors for parts. try local with napa or carquest. I seen an ate on ebay for $205. I'd replace fluid while at it, bleed the system