I can help you convert your J&P Coats and Shillcraft colors to the colors in this brand. I have actual pieces of each color of all these brands and have done visual comparisons and can provide a list describing the comparisons.
Please be aware that shipment for this item can vary greatly, you can email me for current shipping times (depends on the colors). For more than 1 of any color, it usually takes about 4 weeks before shipment is made. I have to order the yarn after you place your order, then wait 2-3 weeks for the yarn manufacturer to send me the order. I am sorry I don't have a better way to do this, but I've tried and it doesn't work. Cynthia