B****y H**l Dan! What a thing to happen!
Hopefully, it's a relatively clean break. If you can drill the end of each leg, and the locating point, you can fix it. Even if you haven't got a small drill, you can carefully use the point of a scalpel. First, gently sand the broken ends, if you think they might need it, just to clean up and provide good joint faces. Then, make holes in both areas, end of each leg, and the locating hole, if possible at least about 3 mm deep in the legs. Don't worry if you can't go as deep, as long as you have enough room to accept some wire, and have it held by Superglue. Next, get a piece of thin wire; if you haven't got anything suitable, straighten a paper clip, or use something like 30 amp fuse wire. Superglue a short length into each leg and, when SET, cut off to a length just long enogh to fit into the holes made in the gear bays. Then, one at a time, glue the legs in place, preferably with tube poly cement, with the wire in the holes of course, adjust the angle as required, then, add a small spot of Superglue to the outside of the joint, just to set it quickly and reinforce the joint. Once the first one is done, repeat the exercise, using the first leg to check angles etc. It should work no problem - I recently had to do it on a P38, and a B26, and the latter had a LOT of weight to hold up. The joint will be glued, and the wire not only reinforces the joint, but provides extra strength and rigidity, stopping any shaking and wobbling.
If, by any remote chance, the above is not possible, then what you could do is form a tube around the remains of the locating holes, either with plastic or brass tube, or, if pushed, by bending some plastic strip around it. Then, using these tubes as new locating points, cement the legs into those.
I know you must be devaststed and totally p!**ed off, but don't worry, it CAN and Will be fixed! I've experienced it, Wayne has, and I'm sure some others have, but the repair works, and any possible unsightly bits can be covered with paint, ans should be hidden in the corners of the wheel bays anyway.
Don't let this minor, but b****y annoying, mishap spoil things for you mate, you're nearly there, with a superb model, and I'm sure everyone else wants to see it finished and 'on the table'.
Keep us posted on how you get on.
Terry.