Is it possible to have more than one SSL cert on one domain?

Example:

sales.mysite.com.crt

and

www.mysite.com.crt

I know it seems weird, but I have a cert file that I purchased previously and it will not expire for a while, and now I am giving our store a subdomain link, which will require the exact address on the cert file.

thanks...

cPanel.net Support Ticket Number: