I have an ultra lift safety cot wedge and Snoooz wrap sleep positionor for sale.
These work to position your baby in the best position therefore minimizing reflux symptoms and providing a safe angle for your baby to sleep.
Unfortunately my son spent most of his younger days in hospital so these were never used.
I bought them both from babyreflux.co.uk and cost me £55 at the time.
Please msg me for postage costs.