In most and perhaps all of the south, callery is now the main recommended rootstock for pears. Certainly for European pears. Someone else will have to answer for Asian. I think so but am not sure.

All my multi-grafted Asian pears were on Cleveland flowering pear root stocks. Three years ago I bought 15 of them at Home depot year-end sale for about $6 a piece in a 3 gallon pot. It is the fastest way to get a big fruit tree.

Tony

All I use for pears is callery rootstock both euro and asian. It works great. Some asians are slightly dwarfed but the euros are fine. Both have produced fruit that tastes great. some what drought tolerant but more tolerant of flooding. It is the king for fire blight resistance. I have mengetsu scion wood that is nice fireblight resistant asian pear. What have you got to trade?