Maybe getting it as product post-type works.

diff --git a/header.php b/header.php
index 3e1c8f4..129ac78 100644 (file)
--- a/header.php
+++ b/header.php
@@ -29,7 +29,7 @@
                                             <?php if($memberPage):?>
                                             <li><a href="<?php echo get_page_link($memberPage->ID);?>">Memberships</a></li>
                                             <?php endif;?>
-                                            <?php $donationsPage = get_page_by_path("donate-now");?>
+                                            <?php $donationsPage = get_page_by_path("donate-now",OBJECT,"product");?>
                                             <?php if($donationsPage):?>
                                             <li><a href="<?php echo get_page_link($donationsPage->ID);?>">Donate</a></li>
                                             <?php endif;?>