This started off being a confusing chase as the number quoted in the Foxbat manual didn't show up in the 3M catalogue.
So after reading all the 'similar' tech pdf's, I ended up looking through the Sika range of adhesives and settled on the SikaFlex252 polyurethane marine adhesive, which was fortunately stocked at my local hardware store.
View attachment 106779 Sika252
I've used both black and white, just depended what they had in stock at the time (it does have a shelf life), but it does cure a bit quick so I did the gluing in sections and tended to skip the 'roll the adhesive up through the fabric to a plastic backing' technique and just rolled and squeegeed(?) the glue through the fabric with small plastic trowels and aluminium roller.
Extremely messy, but ended up with a better finish than when I did the roller and plastic strip version (which ended up with lumps).
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Found that doing four or five ribs at a time gave enough time to properly work through and clean before it started getting over tacky.
Have had no problems with the two aircraft I repaired, one over eleven years ago.