kevz0r was using one on his 5MGTE with no problems, from memory the fuel pressures under boost were similar to what you were looking at.
He has a Malpassi one and has had no problems with it.
The normal adjustable rising rate fuel pressure regulators are $175.Malpassi
This arvo i bought the new higher flowing malpassi regulator for $195. The normal ones have been fine on 600hp applications apparently but for the extra $20 i thought i'd goes for the over engineered one.