Sounds like the racing stuff is a foil with two slots and two jib
halyards so you can raise two jibs at once. Saves having to go bald headed while you drop one sail and raise another. That shouldn't have anything to do with the main.
Should have a halyard
for the main with the tail on the stbd side of the mast
. Boom should have blocks and cleats
on the side to haul down the clue when you reef. The number of blocks will tell whether boom is set up for 1, 2, or 3 reef points. Not a big deal as you can add or cheek blocks if you have more reef points on the new sail than old or just not use the blocks if you fewer reef points on your new sail. Should be a stainless pig tail or hook at the goose neck to hook the reef tacks into. As long as you can find a sail with the proper hoist and foot length, a used sail will work. Really depends on how long you plan on keeping the boat. Unless you find a nearly new sail, you'll be buying
a sail that has already had some of it's service
life used up.
If you go new, give Mack sails a call. They made my sails for about 1/3rd less than the local sail makers.