Export public key with certificate

Hi,

I need to find the right command string to export a public key along with the x509 certificate. (that will give me a .crt file extension)  I actually need it in .CER format but I don't believe pgp commandline can do that (i'll have to convert it using other means)

Looking at the manual the --export command along with --export-format looks like whta I need to do, but doesnt really give me any syntax guidance:

Export Format

PGP Command Line supports multiple export formats:

• Complete (default): Only ASCII-armored files are output; the default file extension is .asc. Use Complete to export keys in a newer format that supports all PGP features.
• Compatible: Only ASCII-armored files are output; the default file extension is .asc. Use Compatible to export keys in a format compatible with older versions of PGP software; that is, PGP software versions 7.0 and prior. Some newer PGP features are not supported when using Compatible.
• X.509-cert: Only ASCII-armored files are output; the default file extension is .crt. The <input> must match exactly one key, and --cert is required.
• PKCS8: This format can produce unencrypted and encrypted PKCS8. Only ASCII armored files are output; the default file extension is .p8. A signed key must be paired. The <input> must match exactly one key.

It doesn't tell me what syntax I need to use to get it out in X.509 format.  There is a command example: 

1. Command to export X509 certificate with public key into DER .crt format or PKCS#7 DER .p7c format 

Thanks!