My suggestion (for that elevation) would be a single pattern cam in the low to mid-250's @.050, on a 108lsa.
Whether you use .875 or .904 lobe designs is your call.

I don't think you'll find anyone having something like that on the shelf.
The closest thing is probably the Hughes 5054.

Depending on what springs are on the heads now, it's likely you'd need to replace cam, lifters, pushrods, and springs to be able to upgrade from the mp533 cam to something like a fast rate .904 solid.

Also, if your heads don't currently have the valve spring locating step cut down, it will need to be for the springs used along with those fast rate cams.