Im not sure that your unit can be adapted... I have the TX-7 Unit... automatic turner like yours... but also with forced air... it is an INCREDIBLE unit for the small hobbiest... 18 Chicken eggs... 48 Quail eggs
Here is my unit before I added the automatic turner
Lyon Industries bought out Marsh Farms & added their product line to theirs... you can view all parts available at
www.lyonusa.com then click on marsh farms parts catalog... then the TX series and parts only link..
To be honest, I've never seen a unit that doesn't have a fan unit, so I'm not sure how old your unit is or if you can retro fit it.. but if not, I might be able to help you out... I might have an extra dome & motor cover for you that might work....
Let me know what you want to do and these are great small incubators! My first one was a TX-6, then I sold it... then eventually had a chance to buy this TX-7...