www.modelrectifier.com

Model Rectifier handles the sales and tech support of Enya Engine. I just dealt with them today for a technical issue, and they are sending me some parts for free, no shipping cost either. They have crash and parts warranty. So unless you damage the parts other than crash, they should be able to give you some free parts.

But for screws, Enya uses regular metric screws, which as stated above can be bought at hardware store for cheap.