Good info above but there are times when having a picture can help?
We can get some ideas of what was there when built but always be aware that things may have been changed over the years and you can find different!
So the drawings give us a look and tell us what was built there to see if it matches!
Normally I expect the big box store to have one that fits in pretty easy but there are some things to look at first. One biggie is how the old and new attach to the cabinet top! I circled that spot on this drawing to take a look there for specifics. Some have some form of attachment at the center and all tubes go down through the big hole. I recommend buying the same type as there now, not one which uses bolts spaced out to the side as I drew in red! The difference being you have the holes for bolts or not, so easier to go with what was there!
The connections are what I think will be the easier part if still OEM. Expect to find an elbow of the type which fits the RV tubing (CTS?) with the end of the elbow that screws to the faucet tubing coming down being standard 1/2 inch FPT (female pipe thread) .
Looks like most any faucet that has the three tubes coming down and using the standard FPT nut to go on the elbow should screw right to the fitting that is there! Always good to get a small roll of what is called "teflon tape" to wrap maybe 2/3 wraps of tape on those faucet threads before screwing them together. If not used to that idea, look at how you will turn that fitting to tighten and then wrap the tape in a direction that makes it get tighter as screwed together. Idea is not to wrap the tape on the wrong direction as it can then try to come loose and wad up as you tighten things.
If it fits your situation, it can be nice to take the faucet off and take it to the store to test fit things there before coming back to find it doesn't fit!
Maybe a picture or two to take along?