Kolm USA was handled by Vogelsang Aeroscale. They did all sales and service here in the states as far as I know. Here is a link to the announcement from their website from a few days ago.
https://www.aeroscale.shop/blogs/new...y-kolm-engines
I know that AMR in Canada used to sell Kolm Engines as well. I just checked on their site and they no longer carry any Kolm products. Not sure what is going on but it doesn’t look good.