Mass generate coupons - addon

I’m looking for an addon that’ll mass generate coupons with a few key features, such as settings for expiry date, discount amount by dollar or percentage, structuring coupon code (ie. appending a set of characters in front of the randomly generated codes ie. appending LTR in front of all coupons codes so they read LTR012LK, LTRXZ912, LTR21PO9, and so on).

Does anything like this exist?

I know there’s already an addon to mass generate gift certificates but it doesn’t have key features as mentioned above: FREE ADDON:Mass generation of gift certificates - Add-ons & Themes - CS-Cart Forums

Has anyone figured this out? I too am looking for this.