Realise this was a year or so ago but what did you do with the old bench seat? I'll be needing one of those soon!
Finally got round to putting in the search belt bracket from @davidoft Took a little bit of adjusting because the bottom hole on the bracket didn't quite line up with the hole already on the bus. But very happy with the final results.
I didn't want the usual hammock for the front mainly due to the position of the headrests and a desire to not having to keep removing them. I saw a different solution online for a T25 (don't hold that against me). And decided to give that a go using the same material that we have for the curtains. Pretty pleased with the results and plan to use it in earnest next weekend. The wife and little one seem happy so we'll see how it goes!