K Line Tank Engine 4-6-4T conveersiopn to DCS

Found a K Line Tank 4-6-4T for sale that I would like to purchase if I can find someone who can convert it to DCS. Fellow train club member has the same engine and a few years ago had it converted to DCS by Engine House Hobbies in Gaithersburg, Maryland. I think the name of the repair/service employee at the recently-closed Engine House store was Louie D'Angelo. If anyone has information confirming that i have the correct name, location info such as address, email, or phone number I would appreciate the assistance.

Also would be interested in learning if there is a repair/service person in the Washington, D.C. area who can do the conversion.

Thanks in advance