The best place (in fact, the only
place to order them) is direct from GAZ itself.
I also have a full set of the GAZ with the part numbers:
GP8-2144 -- 2.5" spring perch adjustable, with spherical bearings, front.
GP8-2145 -- 3" spring perch, adjustable, with spherical bearings, rear.
I sent my inquiry to the general website's "Contact" email address, but the reply came from:
The first person who replied was Mark, but then another extremely
patient and understanding representative named Amanda took over the Gmail conversation (I say extremely patient because both my Credit Union Visa and
my Commercial Bank Visa were initially declined due to anti-fraud measures taken by Visa. I had to call Visa to clear the overseas purchase.)
They quoted me 3/4 weeks for delivery, and that time was accurate. One set came wrapped in bubble wrap, while the other's parts were loose in box, but wholly undamaged. The shocks come with dyno plots.
Cost: 85 GBP fronts / 95 GBP rears / Carriage 45 GBP
Also note that Mr. D. has, I believe, now added a different spherical bearing to the front units.
I also stand corrected: the GAZ 2015 catalog reflects the above part numbers with adjustable spring seats.