There are several, but they're not easy to find. There's a Flying Scotsman O guage kit in weekly instalments for a total of $1200, some older Rivarossi O gauge kits advertised from time to time on eBay and a few Revell HO kits, most of which are really hard to get. If you want more details, respond to the thread and I'll give you more details. It will take a little while to locate all the sites. Most kits that I know of are Steam.