I got the sight mount from Nightvision Optics. Vladislav is the man to ask for, he is very helpfull. There is also a high mount, but I went with the low one, it would not fit if it were any lower so I was lucky with that. The high mount could be altered to give the height you want if you don't want it low on the reciever.
SVD/PSL Side to Weaver
Adapter HIGH
! CLEARANCE !
This universal side rail adapter will give you a flexibility of using a standard weaver mount rings on your TIGER/PSL/SAR-3 and variants with side rail mount. HIGH profile. Weaver base length - 4.25".
HIGH profile side to weaver
adapter, TM-WH for TIGER/PSL/SAR-3 and variants $49.95
--------------------------------------------------------------------------------
Blank side base, SB-14v
! CLEARANCE !
Customizable side mounting base for SKS, Saiga, Vepr and variants (not for SVD/TM mount). Mounts on the left side of the receiver for use with POSP rifle scopes and side rail adapters. Machined steel, black anodized, 14 mm wide, 97 mm long.
Side base, SB-14v $9.95
The low mount is $ 59.95
Shipping is $8.50
The side base is not made for this mount and will need a bit of milling, but this can be done on a drill press, that's how I did mine.