That is a good price for a curve. You might need a longer chain, see what the rear derailier looks like when you have the chain ring fitted. There is plenty of info on the net about getting the chain length right and how it affects the rear derailier angles. You will need a chainwheel with the correct number of bolt holes and the correct PCD to fit the crank. Again there is plenty of info on the net about how to work out what PCD your crank is. You shouldn't need to buy a D10 specific chain wheel. Good luck.