The quick answer is that unfortunately, no, we can't.
PTR (pointer) records are DNS records that resolve an IP address to a hostname. They are used for reserve DNS lookup. This is important to understand as most other DNS records always resolve hostnames to IP addresses or other hostnames.
In order to resolve an IP address to a hostname, the DNS resolver has to resolve the IP address. This happens at the provider of the IP space, and we are not that provider.
Because we don't provide web hosting we can't provide you with PTR records. They have to be managed by your hosting provider, and many hosting providers have dedicated DNS interfaces for exactly this purpose.
If you set up external hosting, you can update the nameservers for your domain host in your iwantmyname dashboard under update nameservers.