Rhyea,
The bed rail at Carrefour is also Safety 1st product. 2 design are there, 1 of it is portable type. It shld be the same as yours if I am not wrong.
I saw another type at Mothercare, their own housebrand and it will have the same problem as what u had now.
I think the one at the BP will solve your problem but too bad it has limited size.
http://www.singaporemotherhood.com/forumboard/messages/581296/4057476.html?1276787575
Otherwise you might need to DIY,
either get 1 from the BP, then re-sew to extend it (but the tube is still a small size)
or
DIY from scratch, sew a cloth like the Sleep Positioners of Snuggle Nest (see
here) but have a concept like the BP, and instead of a inflatable tube, use bolster to slip it in.
hehe.. dunno if u get wht I mean or not.
I think the market is missing such product, most of it did not take into consideration of bed frame with inclined surface to rest the mattress.
It would be ideal if there is a king/queen sized bedsheet with velco near to the side, and have a bolster cover with a long velco strip, then we can just "stick" the bolster onto the bedsheet to create our own bed rail/guard.