I always keep a JAMECO catalog marked up with the latest SE/30 PSU replacements (yes, I am THAT nerdy):

EOS POWER Open Frame PSU — 80W (only one +12v out, no separate +12v out for SWEEP)

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=2081721&langId=-1&storeId=10001&productId=2081721&search_type=jamecoall&catalogId=10001&ddkey=http:StoreCatalogDrillDownView

MEAN WELL Open Frame PSU — 124W (only one +12v out, no separate +12v out for SWEEP)

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=301487&langId=-1&storeId=10001&productId=301487&search_type=jamecoall&catalogId=10001&ddkey=https:OrderItemAdd

MEAN WELL Enclosed PSU — 132W (only one +12v out, no separate +12v out for SWEEP)

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=323775&langId=-1&storeId=10001&productId=323775&search_type=jamecoall&catalogId=10001&ddkey=http:StoreCatalogDrillDownView

MEAN WELL Enclosed PSU — 124W (only one +12v out, no separate +12v out for SWEEP, but has +24v out)

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=323812&langId=-1&storeId=10001&productId=323812&search_type=jamecoall&catalogId=10001&ddkey=http:StoreCatalogDrillDownView

So the question is, does the SWEEP really need a separate (isolated) +12v source. If so, then none of the above replacements will work. I've wondered this for YEARS, so if anyone has the answer, it would really be helpful.