I don't know where you get $20 - $30k for a Rips engine.
What are you going to pay for a Tomei stroker kit? They are way more expensive than a Rips block in NZ.
Just to compare NZ$9k buys you this from RIPS:
RB30 forged internal shortblock for 4WD with with adapter plate and pickup. Genuine RB30 block and crank, high quality forged pistons and billet rods, crack tested, straight tested, ground and grub screwed crank, full balancing, wide oil pump drive, ACL race bearings, acid dipped block with oil restrictors, torque plate bored and honed, decked, new brass frost plugs, all assembled and painted.
And that is more than just a stroker kit. Sure there is shipping on top but all the other extras are things you would have to do with your stroker kit as well.