I've repaired a couple of base stations with this problem. And I once found that even with brand new power regulating capacitors, it still over heated while it was in the UFO case, and cut out. So both the base stations I repaired, I now leave outside the case. Looks ugly, But works great.
Also, I found that you can use considerably lower rated capacitors, which are the same size as the originals, so fit in the same space, without making holes in the carrier case. And it works just as well, if not better than the stock items. I got the parts from Maplins UK. I used a 100uf 50v for the left cap, and a 220uf 16v for the right. Works fine here.. But get the high temp rated versions, if you can. They are only regulating caps anyway, so they either work, or they dont. I'm not convinced different types affect the range significantly. Cos I tried different types of caps in the 1st base station I repaired, and performance was the same. But keeping the carrier outside the case certainly seemed to help the range a bit.