Someone in Holland specialises in Vetean Triumphs and I think also here in UK, sorry I have no links.
Nice find,
back in 1964 when my interest in older bikes was growing I could have bought one of these,missing rear wheel, for thirty bob [£1.50 ] wisely the seller said I was too young to take it on; pissed off at the time I now realise how wise he was then.