So I ordered a couple of the Bansbach struts based upon the part numbers called out in this thread. Specifically BONOF50-100-247/530N, with the A1 and M8 Hinge eyes.
If you use A1 Hinge eyes on both ends (20mm length for each) the total length will be 247+40 = 287 or 11.3" and the minimum compressed length is 7.37", the total travel is 3.93"
The Vans provided strut minimum measurement from the plans is 7.875", or 200MM and the extended length (measured) is 11.8" or 300MM. So an exact replacement strut would be 7.875" to 11.8", with a travel of 3.95".
While the strut works just fine, it is .5 inches shorter than the Vans provided struts. So the issue is the door will not open fully with these struts. Due top the leveraged position the strut is mounted to the door, this leaves the door considerably closed compared to the correct length strut. My plan is to machine a new lower end piece to extend the Bansbach strut to the correct 7.875".
As an aside issue, to achieve the auto-dampening at full open, the Bansbach product must be mounted with the large body attached to the door bracket. If you used the Vans strut to determine the spacing of the bracket on your door, you will have an interference with the body of the Bansbach strut, which is a larger diameter body than the Vans strut. This requires some slight modification to the bracket. My door is painted on both the inside and outside and has the Planearound center latch. The 530N strut will raise the door without any assistance, and dampens the final inch of travel.