Go for baroque!!!

I'm seeking a tenor ukulele with a rounded bottom -- like half a watermelon cut lengthwise. Prefer to buy from online dealers such as Mims, HMS, Reverb, AlohaCityUkuleles, UkeRepublic, Elderly or eBay. Price around $500 or less, with reasonable shipping costs.

Any & all clues or leads will be greatly appreciated.

This guy could build you one: https://www.dusepo.co.uk/Instruments
Look up dusepo here on UU