Edit button hrefs without modifying template

I've made a template built with tokens in an effort to discourage users from modifying the style. I'm able to edit everything I want aside from the button links. I can edit the text but I want a simple way to have users change the href address. Here is my current button within the template:

      <!--[if mso]>

                    <v:roundrect xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word"

                    href="#"

                    style="height:42px;v-text-anchor:middle;width:175px;text-align:center;" arcsize="0%" stroke="f"

                    fillcolor="#ff9d01">

                    <w:anchorlock/>

                    <center>

                <![endif]-->

                    <a id="CTA-Text" class="mktEditable webfont" href="#"

                      style="background-color:#ff9d01;color:#ffffff;display:inline-block;font-family:Arial,sans-serif;font-size:16px;font-weight:normal;line-height:42px;text-align:center;text-decoration:none;width:175px;">Register Now</a>

                <!--[if mso]>

                    </center>

                    </v:roundrect>

I've tried HTML snippets but they do not accept the MSO conditionals. The html link we are going to use includes the lead id token, so nested tokens are not an option. It's looking like I'll have to have a plain text link or have duplicate templates for each user. Any ideas?