What are your recommendation for rear shocks for 1979 GS859G?

[Grimly]

Do you know what part number those shocks are? I'm doing a little e-bay searching.

I don't recall a part number as such - but there are usually some up for sale. Of course, the prices vary according to luck and dream-time owner expectations
Beware of fitting length - one or two of the Harley models are fairly low-slung and 11" shocks are no good. I've got a note of the longer ones somewhere, I'll dig it out tomorrow.

[Grimly]

Ok, here's what I've found out from here and other places.
Eye to eye measurements...

FLH and FLT 11.5"

Dyna models (late) 12"

Dyna models (early) 12.5"
Sportsters 12.5"
V-Rod 12.5"

FLH-FLT 13"
FLR and XL 13"

VRSCR 16" (what? might be a misprint)

[Brendan W]

I fitted a pair of Hagon 33014SA. Came in at 230 Euro here delivered. Three position preload and no damping adjustment but they transformed the bike, very happy. They did replace a pair of cheap OXON rubbish that leaked. Ride a lot two up.
Front is not stock, looks like some Katana springs in there with ramp preload adjusters- no air.