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Those were pretty rare and I'm sure we're M950 only, they disappeared from the line up when Shimano noticed that most folk were running MRP type guides in 32 - 38 tooth up front - sure you're will be a bit bigger.
For M952 they used to get thick single rings (AC / Middleburn etc) and bolt them in with any of the guides that were about. Incidentally mine is a set with a 1st gen Evil (later to become E13) SRS which is pretty rare
Worth just mentioning that (if memory serves) the 4-bolt isn't standard, it's a slightly odd BCD I think. The spider that fits with a bit of filing is likely to be LX/XT, m739 possibly.
AC made a compact spider, there was one listed on here recently but way more than I was prepared to pay for it. ATB size comes up much more often though