Not sure if you saw the thread started before the group buy here:
http://castboolits.gunloads.com/show...-hollow-points
I was planning to get one but was concerned about the extremely deep HP and very little taper on the pins so I decided to make my own push out/cylindrical mould to try it out. I made mine slightly undersize so it could be knurled up to 0.315"/0.316" to suit my .303 Lee Enfield.
Surprisingly the pins were not a hang up issue at all and the boolits shot very well so in the end I didn't get the Mihec mould as I had my home made mould that worked well.
The old Ideal cylindrical moulds look like this:
I make mine from 1 1/2" round bar... but no lube grooves so knurling is required.
The driving bands/lube grooves and bore riding section look like they are modeled after the 31141 but with a shorter wadcutter nose. Thehouseproduct did the CAD for this one so you might try PM'ing him and if he is still "connected" he may allow you to use the CAD file.
They cast at about 150 grs.
Another option I've found very good is the Mihec 316410 HP. There is a group buy on for this right mould right now. They cast at 130 grs. solid and about 125 with deep HP pin. I went plain base and have no leading issues with moderate loads and the boolits blow up in a gallon water jug with just small pieces leaving the jug. Those are cast in ACWW.
If you really want the Ness Safety Bullet you might try Accurate Molds. Tom will make what you want but he doesn't do HP pins so you would have to get an HP pin from someone else. If you went that route I'd suggest having Tom bore the bore riding nose straight through then you could get different shaped nose forms made along with varying diameters and depths of HP pin.
Longbow