B-29A "Enola Gay & Bockscar"

Spanjaard
If you click in the product page (the link you provided), you can see several stores that offer the kit. There will be others for sure also having it in stock. About the detail sets, the probably arr from different manufacturers (brengun, etc). If you click on the topic (B29) in the product page (link tou sent) you can see all the products in the database for this topic, if you filter by scale, and category detailset, you will get to
SCM Search: *
If you click on the sets that you want, you can see the stores that sells those (for sure, there are other shops too)

Spanjaard
Be careful to check if they are for the brand/model that u want (a detail set for a revel model may not be possible/easy to use in the academy one)
I would also suggest the video, since maybe there are links to specific items so you can easily identify them
Good luck 🙂

Rick402
Thank you Spanjaard! This community I real) helpful and awesome!