This insertion on eBay seems to sell Hewes 35mm reels for Jobo 1500 tanks, but if you read the fine print, it also says:

They are available in various sizes for use with main film formats, but we are always pleased to quote on special made-to-order spirals to suit your particular needs

http://www.ebay.co.uk/itm/Hewes-Stee...-/290592304341

Fabrizio