A Texture pack for MCPE which has some blocks for trains in it, this is mostly for just having a link to it, but you are allowed to download it
IMPORTANT: i do not know if this works for MCPC too, but you can try
[NOTE]: this currently only has blocks for Bogeys, a NS 1700, an NS ICMm, and a NS VIRMm, but there will be more things added in the future, also this is only for downloading purposes, so it wont have a long description