You can design your own primer pair using programs such as Primer3 (http://www.bioinformatics.nl/cgi-bin/primer3plus/primer3plus.cgi) for any DNA sequence. After that you may want to check primer specificity by something like Primer-Blast (http://www.ncbi.nlm.nih.gov/tools/primer-blast/) or Primex (http://www.researchgate.net/publication/233734306_mex-0.99.tar). If you are interested in a specific bacterium, this should be straightforward. If you need to amplify orthologous regions from several bacteria, you should probably construct a sequence alignment of the gene family and seek primer pairs that fall into conserved regions.

Data mex-0.99.tar

NCBI Primer-Blast is a good place to find your sequence and pick up your primers. It is Primer3 based plus Blast software.

There are several papers on cloning and expression of bacterial asparginases that contained primer sequences.you can check those primers for your own bacteria.