Hi Norm. You name it they probably have it. I carry male adapters on my truck with threads on both sides just for raising sprinklers an inch. If you need to raise it farther you can just use a coupling with threads on both sides then a riser. My favorite online fitting website is http://www.my-tee.com/ One to two day shipping everytime I've used them.
If I can't fix it, it's broken!