Updated Support section and added funding email (#4860)

docs/index.md

@@ -260,7 +260,7 @@ Framework.
 
 For support please see the [REST framework discussion group][group], try the  `#restframework` channel on `irc.freenode.net`, search [the IRC archives][botbot], or raise a  question on [Stack Overflow][stack-overflow], making sure to include the ['django-rest-framework'][django-rest-framework-tag] tag.
 
-[Paid support is available][paid-support] from [DabApps][dabapps], and can include work on REST framework core, or support with building your REST framework API.  Please [contact DabApps][contact-dabapps] if you'd like to discuss commercial support options.
+For priority support please sign up for a [professional or premium sponsorship plan](https://fund.django-rest-framework.org/topics/funding/).
 
 For updates on REST framework development, you may also want to follow [the author][twitter] on Twitter.
 

docs/topics/funding.md

@@ -308,7 +308,7 @@ Our professional and premium plans also include **priority support**. At any tim
 
 Once you've signed up I'll contact you via email and arrange your ad placements on the site.
 
-For further enquires please contact <a href=mailto:tom@tomchristie.com>tom@tomchristie.com</a>.
+For further enquires please contact <a href=mailto:funding@django-rest-framework.org>funding@django-rest-framework.org</a>.
 
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