I agree with the A8-0 and 1/2A3-0 as well; I tried to list the 6 most needed SU BP engines.
Of these, I think the only ones we have any chance of getting out of a MAJOR manufacturer are 4 thru 6, even though I think the B14 is BY FAR the most needed.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !