I'll probably have to build something myself.
....which is exactly what I did.....but not because of the delays in this new truss bridge. I built my layout a few years ago and had two tracks to 'leap' across a doorway to a storeroom. I used the Lionel Bascule Bridge for one, the Lift Bridge for the other. But since they were not long enough to do the job themselves, they were built into lift-out sections including short track pieces at either end. Actually, the storeroom has bi-fold louvered doors that open inward, presenting no interference to the bridges. So, if we (wife and/or I) are feeling flexible enough on a given day, and MUST access the seasonal items in the storeroom, we'll do the 'layout limbo' rather than remove the bridges.
All in all, it's worked well...and exercise and an excellent chiropractor have maintained our flexibility adequately! (Besides, there's too much under-the-table electrical work to be done as things change/progress to yield to age!!!)
FWIW, always...
KD