Estes Super Neo XL coupler or equivalant

I'll start as usual with a little rambling.

Ramble start:
Frustrated at the weather not letting me cut pieces for one of my builds (afternoon showers and temps in the 100's). And lack of space/funds for another. I decided to build one of my Super Neon XLs.

I had a 29mm tube and screw on retainer so I went with a 29MMT. Anyway...

The BT has a crease at one of the spirals just above where the tube fins are. I don't remember seeing it before so I think maybe "not me" or "I don't know" has struck again. I can cut it and strengthen it no problem. Except I need a coupler to do it. A full length coupler would be ideal. I could just run it down in there with no need to cut the BT. I can use the excess for an A/V bay (yep, I hate fooling with delay times, a quark is simple) and to strengthen the tube fins if need be.

I am no good with Estes sizes, I think it is BT-60. FWIW a 38mm motor slides into the coupler near perfectly. Which almost led to a 38mm minimum diameter tube fin.
Ramble end.

I am looking for lengths of whatever size coupler fits in this. BT-60 I think. My mic is saying 1.58" OD for the coupler. Anyone have anything like that taking up room?
And what is the Balsa Machining Services equivalent? I can order from there if I have to. Trying to avoid that though, because if I got there stupid motors will fall into my cart and I will have to pay for them.

Thanks,
Mikey D

I can help id the parts.

The Super Neon XL airframe is BT-60 part #030401, the BMS equivalent is T60-34. The coupler is approximately 3 inches long, part #031777. BMS has a 4 inch coupler part C60-4 and a 34 inch part C60-34. I made servicable replacement couplers for my Mean Machine (BT60) years ago using a toilet paper core wrapped with 2 layers of printer paper/white glue then CA on the inside. The extra length helped align and strengthen the long airframe.

PM sent. I have a a coupler for you.

Thanks for the info Samb,

Thanks for the offer Eric, pm sent.

We had a bad storm come through last night, power been out since 1030 or so, so I've been a bit slow responding . It's miserable here.