The RIMZ are AWESOME for the 40/10 mm for the 610. They hold the cases perfectly and don't bend like the metal clips. I use these exclusively in both my model 610-2 and 610-3 for shooting USPSA and ICORE.
The RIMZ clips for the 45 are ok for general range shooting but they don't have enough meat on them for carry or keeping the cases in a carry situation.
They do not make (yet?) 38 spl RIMZ for any revolver (6, 7, or 8 shot) that I know of.
You have two or three choices for moonclips for 38 spl. Ranch Products and Hearthco. Hearthco's are expensive but they are made out of stainless steel and are cut with a waterjet system. They are pricey but they are the gold standard in moon clips. They are available for Remington/Federal and a thicker one is available for Starline 38's. Some people use 38 short and long colts and he makes them specifically for those people who use them in the 627. Dave is a great guy and I've squadded with him at matches on the west coast. Sometimes hard to get ahold of, but I believe they sell his clips at moonclips.com.
You could also make a demooner out of an old golf club handle that was of the aluminum type. A hacksaw or dremel tool will work as a cutter.