"Track You Package" button - wrong tracking API for various shipping providers

Hi,

The various shipping providers constantly change the parameters of their tracking URLs. For example right now the one that is hardcoded for Bulgarian Post:

http://www.bgpost.bg/IPSWebTracking/IPSWeb_item_events.asp?itemid=RI310758456BG&Submit=Submit

no longer works and it simply redirects to bgpost.bg.

I suggest Tindie allows me to specify my own tracking URL, so I can use an universal tracking site like this one:

Thanks!