I had a custom sticker made for the cabby "Escort XR3i turbo" echoing the style of the '90 spec ERST decal in red vinyl. Looks nice, and more importantly looks factory. I personally hate it when people put an "Escort RS Turbo" decal on anything that's not an ERST.

If I were you, I'd go for "Escort Bonus turbo" in the '90 spec ERST style in black or red Vinyl.

Lee