Is it a repro or an original?
Leupold occasionally makes a run of the bases for the 52B and C repros and you can find them if you search around but they aren't easy to find. If original, you would need to get a Vianni style mount which are expensive or have your receiver drilled and tapped. Also, there are some Browning bases if you can find them for the 52 Browning repros, which are a copy of the 52C but have the same base hole pattern. Then, any standard rings will fit.
The height of your scope will depend more on the swing of the bolt handle than the height of the rings. You'll be lucky to get by with medium rings with most scopes.
Your best bet is to check on Rimfirecentral.com in the Winchester forum or the Trading Post (classifieds). They have been extremely helpful to me when I've needed information.
Here are a couple I found for sale. Might have to hurry on the gunbroker units.
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=538787055http://www.ebay.com/itm/Winchester-52B-Rifle-Scope-Adjustable-Rings-Set-Leupold-22-LR-/361471318494?hash=item54295e99de:g:7YgAAOSwoydWnSqN
Bob