mirbase gff annotations in bed format

The mirbase.org folks in Manchester are doing a great job, I think, but they only release their annotations in gff format.  I think the following will convert that into an acceptable bed-format file:

## get mirbase18 annotation and convert to a bed like format
 wget ftp://mirbase.org/pub/mirbase/CURRENT/genomes/hsa.gff
 grep -v "#" hsa.gff | cut -f 1,4,5,9 >mirbase18.temp1
 grep -v "#" hsa.gff | cut -f 6,7 >mirbase18.temp2
 paste mirbase18.temp1 mirbase18.temp2 | sed s/^/chr/ >mirbase18.bed

Extra credit: Is there a clever shell trick to piping two separate stdins into paste, thus avoiding the temp files?