Even for the B2710 in 1999, I could not find a "kit". My Kubota dealer said he'd never heard of one until you got into the L series. So I bought individual parts and did one myself for the B2710, but I never even thought about doing it on the 1995 B7100 I had.
And grossgary, top 'n tilt refers to replacing the top link and at least one of the adjustable side links of your 3-point hitch with hydraulic cylinders, the necessary hoses, valves, etc. so you can tilt implements forward and backward and side to side hydraulically.