Thanks for your advice, my little'uns are 9 and 3 and my little girl is a bit of a monkey and I wouldn't put it past her to make a break for freedom over the edgeI asked the same when I was getting my roof fitted.
The best I could find was HERE
However I haven't bothered in the end. Guess it depends on how old your children are; mine are 8 & 4 and we've had no issues. As children are short they can sleep further down the roof bed, therefore less chance of pillows etc falling over the edge.
If I was going to do anything I would probably make a slim L shaped board to slot in front of the bed board to further close the gap and provide a 'barrier' to bits sliding off.
I guess having one that is a total solution with no means of escape would introduce seperate health and safety issues which is why they are not marketted, so makes sense. I am thinking that just stuffing a few extra pillows up there is probably just as effective to stop them rolling out.Austops do one having one fitted this week but like you say wouldn't stop them climbing out even the one in my mates Cali is the same it's to stop them rolling out when asleep.