Hi Morison, welcome to the forum.
I'm assuming you are thinking of advertising your accommodation in Bo'ness (rather than looking for a holiday yourself) - I have a few suggestions:
If it is that you have accommodation near to the Bo'ness & Kinneil Railway, then contact them as they have links to accommodation on their website (under the heading of sleeping & eating -
https://www.bkrailway.co.uk/find-us/
Railway Station Cottages -
http://www.railwaystationcottages.co...ottish-region/ - these are all holiday lets in railway-themed locations such as former station buildings, railway carriages etc.
The Railway Magazine has some classified ads for railway holiday rentals (only 1 for Scotland on this list currently) -
https://www.railwaymagazine.co.uk/rail-stays/
I know that other railway magazines (including Steam Railway & Heritage Railway) have classified ads for holiday rentals, but they don't seem to have them on their websites.
Hope this helps,
Tony