Thanks Tac3.5" gauge track is outside the purview of what we call garden railways here in UK. It is a model engineering gauge, and with US prototypes, the locos are quite capable of hauling ground-level trains with six or eight adults.
It's not that common in the US, either, with most folks going for larger gauges.
I recommend your pals to get onto this FB page - 3 1/2"(And Smaller) Gauge Railways | Facebook.
THIS is THE definitive model engineer scales website in the USA - I've high-lighted the page that has track manufacturers on it - Rolling Stock, Live Steam
Depending on where your pals live, it might be a plan to contact the nearest live-steamers club/track.
If it’s just display track that’s being sought I used to make my own with slim steel rectangular section set into wooden sleepers ( in my case roof tile battens) or display base for my 3.5” and 5” gauge locos,3.5" gauge track is outside the purview of what we call garden railways here in UK. It is a model engineering gauge, and with US prototypes, the locos are quite capable of hauling ground-level trains with six or eight adults.
It's not that common in the US, either, with most folks going for larger gauges.
I recommend your pals to get onto this FB page - 3 1/2"(And Smaller) Gauge Railways | Facebook.
THIS is THE definitive model engineer scales website in the USA - I've high-lighted the page that has track manufacturers on it - Rolling Stock, Live Steam
Depending on where your pals live, it might be a plan to contact the nearest live-steamers club/track.