Radwagon 4 deckpad alternatives?

[thirdkieu]

Hello all. I ordered a radwagon 4 for the wife to ride the kids to school and have been waiting for the deckseats to be in stock for 3 weeks now. I am anticipating not having seats upon delivery of the bike and the company doesn't seem to have any guidance on when these will if ever be available again. Wondering whether anyone knows of a good/affordable alternative seat(s). I also have the caboose to keep the kids safe but concerned of lack of backrest and it doesn't appear that Rad Power offers one. Would also appreciate any thoughts on a backrest option or preferably twin backrests would be amazing. Thanks

[danb123]

I ordered this and used straps to hold it on:
TOPCABIN Bicycle Manned Cushion... https://amzn.to/3EhNlzX
It works fine.