condolences to you, and to his family i recently lossed a dear mate I have know for over 40 years it does kick you in the pants and make you hug those that are important to you a little harder.
https://musingsofamiddleagedgeek.blog/2018/06/28/jaws-the-art-of-fear-in-filmmaking-exhibit-at-catalina-island/
heres images from the Jaws exhibition were the original barrels are next to the damaged actual cage from the movie, you might be able to extrapolate the cages size from the barrels...
thanks just glad it arrived in one piece, just found a source for actual velum so might post a thread later in january giving that a try, as to time about 90 hours, but whos counting enjoy