DT, FT , BigStock and StockXpert all allow both JPEG and a vector format (for FT it's SVG not EPS-8) but it's for the same image - i.e. you see the various JPEG sizes and then the vector format for extra money. You'd want to look at the prices though, as I don't think any of them value a complex vector highly enough. FT, for example, I think is 7 credits for the vector format. That's OK for something simple, but way too low for an elaborate vector.