recaptcha Virtuemart bikestore template

Hello Gavick Team.
I would like your help to put ReCaptcha to ask questions (virtuemart)?

My template is bikestore!
I have enabled ReCaptcha to contact form!

Some spammers sent me email in the morning!

You need to ask about this on VirtueMart forum because adding captcha in this place demands changes in VirtueMart extension. I don't know any easy way to include captcha there but please look at extensions.joomla.org maybe there is some free plugin to do this.