Why, thank you, Jane! I appreciate your kind words. :)
It's probably not too late if you wanted to make a deal with them. You might start with one or two pieces as a trial run, and make sure you have an end date written into the contract. Your work would make phenomenal cross stitches, and it wouldn't surprise me if you sold quite a few of the larger kits. Cross stitchers are usually older retired ladies with extra spending money and some serious time on their hands. If they come out in droves to buy your kits like I imagine they would, you'd have great leverage for increasing the percent with each future kit. But it's entirely up to you. If your gut is telling you no, you should listen to it.