Adding a button to a product page

Site URL: https://www.tealcanvas.com/

Good morning Squarespace community!

We are about to launch a site that spotlights a number of artists available for unique commissioned pieces.  Each artist on the site is represented in a product page.  Above the line is their bio and examples of their past works.  Below the line, in the additional info section is their range, turnaround time, and a photo of them.  We have a button below the line, in this section, that is our call to action..... Contact artist.  This links to a form that states a buyers intention to work with the artist.  Obviously this is very important as it is the main drive for the site.  However, it is buried all the way at the bottom, needing scrolling.  We would like a similar button at the top of the page, near their name, their bio, or their portfolio. However squarespace does not allow a button to be included in the top portion of a product page.  

Does anyone know a workaround? We would love a similar button at the top of the product page.  A ton of info I know, just want to clarify what we need.  

Thank you so much in advance!

FYI, we are still password protected.  If anyone wants to see what I mean...

www.tealcanvas.com
Password - Tealcanvas0202

You can add a button on Additional Info, then let me know. We will give the code to move its position.

There is already a button at the bottom of the page as produced in additional info. We want to duplicate this button above the line, right beneath their bio paragraph.  It's our main call to action, so we don't want people to miss it if they do not scroll down.  

Thank you so much Tuanphan!

@tuanphan be your best friend if you help out?  An above line is going to be instrumental as a call to action that is visible and immediate.