email guard plugins

so i installed the WP Email Guard Plugin in order to protect the email address here: https://www.diveneycue.com/wordpress/contact-us/.

But when i viewed the page source code i realized that the plugin does NOT protect the email address in the “VIEW CART” button.

<form target="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_cart">
<input type="hidden" name="business" value="[email protected]">
<input type="hidden" name="display" value="1">
<input type="image" src="https://www.paypal.com/en_US/i/btn/btn_viewcart_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>

please advise how i can stop spammers from getting a hold of the email address in this part of the code??? thanks.