Welcome to the forum!
I can't quite count how many teeth the gear has, but if you search for "Lima Gear" on Peter's Spares website, you should hopefully find one suitable.
If that doesn't prove fruitful, you can often get 'scrap' lima locomotives fairly cheaply on the likes of eBay which can be cannibalised for bits (or a complete motor bogie depending on your luck!)
Regards,
Cameron.
I can't quite count how many teeth the gear has, but if you search for "Lima Gear" on Peter's Spares website, you should hopefully find one suitable.
If that doesn't prove fruitful, you can often get 'scrap' lima locomotives fairly cheaply on the likes of eBay which can be cannibalised for bits (or a complete motor bogie depending on your luck!)
Regards,
Cameron.