ULKA EX5: repair/ replace?

ULKA VIBRATORY PUMP EX5

This is a popular pump for espresso machines. I burned out this pump
on a Rancillio Nancy. I used the Nancy daily for more than I year,
set up with a timer, so it would be warmed up by the time I woke up.
I inadvertently left the pump switched on, the timer turned on the
machine, it pumped out all of the water, and I burned out the pump.
1) I noticed that 41W and 52W ULKA VIB PUMPS are available. The
original is a 41W. Any reason to stick with that rather than getting
the stronger 52W?
2) I found rebuild instructions for this pump
<http://www.myschiffman.org/cg/rebuild.html>
Anyone know where I can
buy replacement parts for rebuild, if needed?
3) Anyone selling a
used ULKA EX5?
4) Is there an alternative pump I might consider?

Thanks,
Larry

.

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