Hi Stephen,
First of all, welcome to the forum! As Peter says, any reputable engine stand will work (or can be made to work) with our engines. In the grand scheme of things Beta engines are not that heavy, so there's no need to go absolute top of the line. I got my engine stand from SGS Engineering in Derby, who make a wealth of good quality but reasonably affordable workshop gear. When I first mounted my Beta 2L engine on the stand I used the bell housing mounting points, but that severely limited access to one end of the engine and wasn't ideal.
So I asked the question on here as to how and where people bolted their engines to stands and that thread should provide most of the answers to your question. As a result I decided to build (or have built) an intermediate plate that bolted securely to both the engine stand and the block, using stand-offs on both sides of the plate to accommodate the necesssary bolt heads This thread gives details of my adaptor plate as well as general engine stand info:
https://www.betaboyz.myzen.co.uk/forum/index.php?topic=4217.0Any questions, just ask away...
Graham