(Correction to my previous comment - it was on ebay I saw it.)
I contacted him last week because I was wondering if the body would fit a neck I have and he responded to say no it wouldn't.
The descriptions says that the bridge pickup is routed for a Bart.
Seems straight-up to me.
I'd looked at that BLX 80 head, as I've got a combo with a noisy amp; unfortunately, mine's tweeter has gone too, so probably not worth spending money on.
(And I've got an Elf, so don't really need another amp.)
I was quite taken by this BC Rich copy which appeared on the "Also viewed" list.
https://www.ebay.co.uk/itm/Custom-build-B-C-Rich-Ironbird-copy-4-string-fretless-bass-guitar/282870786790?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D43781%26meid%3Dd2f20eb782ee4c50b4e702e84f6a3815%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D112853900874%26itm%3D282870786790&_trksid=p2047675.c100005.m1851
(Apparently its maker has been certified.)
Looks like someone was trying to turn an SG into a Strat!
https://www.ebay.co.uk/itm/1986-Gibson-SG-Special-400-Restoration-Repair-Project/152933008058?hash=item239b8482ba:g:P~8AAOSwA3dYmHlm
I met Mo Foster in the 80s after a Jeff Beck gig (on the There & Back tour) and he also played on Michael Schenker's 1st album (same rhythm section as on the JB album, with Simon Philips).
I'm in Berkshire, 20 miles West of London and the snow is settling; I'm debating whether to do the 2-mile drive to work!
Hopefully things will be clear on Saturday, so I'll be able to get the train in...