I use the AT 4010s when I need a lot of suspension, ie I know it will be a rowdy crowd and low-pro isn't an issue. I have been using the Superlux HK-32 mounts for the past several months with the shure bar. I keep them mounted to the Vert bar and just lign them up end to end and they store nicely. They are kinda cheap but if you are somewhat careful with them IME they will maintain. I just ordered another pair actually, $20 shipped, can't beat the price, and IMO there isn't too much else out there that is very low-pro and still provides some isolation.
I think the newer ones were a couple mm smaller than the older style, but should probably still fit. Check out the Joe Meek mounts and look at the size specs. They are essentially the same mount as the SP ones.