I have a Shimano FC-R600 compact crankset from 2004, now with worn-out 50T chainring. (At this point I'd prefer to by a new bike, but hard times and all...) I've found an online retailer with these two chainrings:
'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
The 5750 and the 5650 are both 10-speed chainrings with the 5750 being slightly modified and part of the 5700 group. In practical use, there will be no functional difference. Buy which ever is cheaper.