I am interested in upgrading my IP, and I contacted MYNA. I got a quote which looks lower than what you got. Not sure if the value of the EURO or USD has anything to do with the new, lower price. The only problem is getting a core pump and the costs of sending it overseas, and then paying for shipping to get it back. This is what they had to say a few weeks ago.

"As the M pump is originally from NA engine it does not have LDA. Custom
made LDA costs 200€. The LDA basicly limits the fuel delivery in
function of boost pressure and thus prevents black smoke before the
boost pressure rises.
So the total cost for the M pump rebuild would be 1050-1100€.
Shipping is around 120€."

Address is:
Mynä-Diesel Oy
Järvenkalliontie 9 (street address)
23100 Mynämäki (postal code and city)
Finland

-Antti