A rear hub spaced at 130 can not be respaced to 126 if the hub is for 8 or more speed cassettes because you need extra room for those extra gears.
BTW I had a frame with 126 spacing that could not be cold set because it was titanium. I rode it with 9 speed dura-ace for 10 years and the only problem was changing flats on the side of the road. It was a bit of a trick getting the rear mech out of the way and spreading the stays and holding the bike up at the same time. You needed three hands.
I checked it out. It looks just the ticket, so I joined Markplaats! I sent the gentleman an email; in English....my Dutch is...as good as my Serbo-Croat!
I asked him how long the head tube was, and he sent me top tube measurements!
Excellent, good luck. Postage shouldn't be too bad from Holland.
I think Tel said he knew a courier, you could get in touch with him or try our Dutch friends in the international section and they will know the best way forward.