the frog cushion used to be sold by ikea, but i don't think it is anymore. you can maybe find it on ebay or craigslist. i used to have one but since they changed their collection i haven't been able to
stone fabricator. However over the past few years stone sinks are easier to find. Check your local plumbing source and stone fabricators - or - google honey onyx vessel sinks. I just did and found several affordable available.