Vendor System Recommendations?

Hi everyone! I hope this is ok to post here, I couldn't find anywhere else to put it. I recently came back from something of a hiatus from SL, and I'm in the process of rebuilding my old business. I have a vendor system I've been using for years that meets my basic needs, but I'd like it to do more, considering how much SL has evolved since I first acquired it. Unfortunately, while the creator of my current vendor has an updated version that's near-perfect, they're unwilling to do a small custom mod to add a feature that's crucial to my products. I've done some searching on Xstreet and what-not, but most of the vendors I've seen are geared toward "simple", and a simple vendor can't meet my needs.

So, does anyone have any recommendations? Here are the features I'm looking for.
==Must Have==
-Basic vendor functionality to buy things (duh)
-Categorized viewing (Category->Product) OR multiple variations of each product (Product->Feature Set) with notecard per upper-level selection (notecard-per-item is ok, but not necessary)
-Gift card system OR purchase-as-gift
-Fully customizable appearance (textures, basic shape, and button arrangement), preferably without finicky link-orders
-Ability to create as many buttons as I need, without requiring customers to scroll through multiple pages
-Ability to specify a colour value instead of a texture for each product's selection button. This will probably have to be a custom mod, so a vendor maker willing to do custom work is a plus.
-Email-on-sale
-Support for inventory of at least 200 items

==Nice to Have, But Not Crucial==
-Tri-level organization (Category->Sub-Cat->Product OR Category->Product->Variant)
-Holo display
-Integration with a web-based catalog, either full or partial (specify a product ID in-game to bring up that item in the vendor, all else is extra fluff).

==Not Important==
-Split sales (it's a sole proprietorship, and I don't see that changing; I've never needed it for mall space rentals)
-Advanced sales/stats tracking (I do that on my own)
-Server functionality.
-Sales/Preview modes for sounds, clothes, textures, body parts, or anything other than objects.

Thanks for any help y'all can give, I really appreciate it!