basically the calculation for the 7.5mm elements is:

60 EUR/element + 8 EUR/delivery valve

I personally got a perfect pump within almost shipping time (< 3 days in the shop) and additionally 500 EUR from PP D in Finland, including external adjustment possibility.
This was a 6 cyl. M-turbo pump.

The result is a plug and run IP without any idle or whatever issues that gives good power (not dynod yet) without smoke and without turbo lag.
The rest of the engine is still stock.
Economy is better by approx. 20% even when using the extra power.

Tom