Only Cub Cadets - 1211 a deck to c deck conversion

It’s that time of year. Love my 1650 mows great but need to tear down and replace gaskets in transaxle.So my nice 1211 needs a mower deck. Haven’t been able to find one local. Am going to utilize my A deck .Bought a mower drive belt pulley from bullpen. Believe it to be 4 1/2 inch top and bottom for c deck. Have all original mule drive and electric pto equipment for 1211. What I haven’t been able to locate is proper mule drive belt sise with certainty. I think old part number is 135 469 c1 from my research. Which would be 954 3003a new number ? 5/8x 88 1/2. The price of new oem special order belts would like to be in the ballpark first time. Thanx ahead of time maybe Roland can work some more of his magic. Oldbev