Hi, I bought both items from Brick Lane Bikes earlier this year. I haven't used them and they are now surplus to my requirements.
The Chain Keeper is the 35.0 diameter version and could be used on a smaller diameter seat tube.
Chain Keeper details here: https://www.bricklanebikesshop.co.uk/products/paul-components-chain-keeper
Extension bar details here: http://www.paulcomp.com/chainkeeperextension.html
Pictured available on request.
Total cost to me circa £73 inc postage, looking for £55 inc postage.
Thanks for looking.