Try Kanter Automotive (look for web site) or J.C. Whitney. Get a set of spotlight brackets that are for your Buick. The easy way is to line them up on the car in the correct spot, and drill at the same angle as the hole on the bracket. Most unity spotlights have parts that are interchangeable (shafts, buckets, etc..) You may be able to go to a wrecking yard or swap meet and buy several parts type lights and make a good one or two. I have done this often, it works great.. You can also buy the Buick spotlight cresta from Kanter too, if you want them..