It's not as good as a Glute/Ham, but you can play around with a 45 degree back raise machine. Lower the hip pads, and put some plates on the foot plate to bring your knees and ankles closer to the same height. You can really generate some tension in your hamstrings this way.
There is the "hyper deadlift" where you do a back raise with the barbell in your hands like a deadlift. Again, not like a Glute/Ham Raise, but everyone who tries this lift raves about it.
Pull thu's on a low cable are good for hamstrings/glutes/back and hip extension.
I do have to agree with Yogi that the lower back will try to "cover" for weak glutes. I'm not saying your glutes are weak, but some clams shells or lunges usually help me get my hips under me, and keep my back flat and strong instead of over-arched during lifts.
As for reverse hypers;
They are pretty awesome. In my opinion the stretch at the bottom is more important than the "contraction" at the top. The best part of the top is the stretch I get in my hip flexors.
If there is a more decked out gym near you, I'd totally make the switch to get on more equipment.