Reverse osmosis filter plus other (Worle BS22)

Reverse osmosis filter with rating of about 50L per day, plus post reverse osmosis filter (that is pribably a carbon filter) and two fittings. New, and the RO filter is still in a sealed bag, but the new post filter arrived without a bag, but with fittings.
These were part of a 5 filter replacement set, that I ordered for my 400L per day RO unit, from the company that I bought my RO filter from.
They sent me wrong set of 5! The have since sent the correct two filters and don't want these incorrect ones back.
So I am wondering if anyone has a 50L RO unit and would like a new RO filter and post filter.
These won't work on their own. They are designed to be used with prefilters and the appropriate RO housing unit.

       
Approximate Location         Show marker