SMPP <> PHP for sending SMS

Hello, We are urgently looking for a kind of PHP class/script/... for sending SMS messages over the SMPP protocol. We need 2 classes: 1. sending SMS messages (basic messages so FROM, TO; MESSAGE) and the function/script/class needs to answer with "ok + message id". 2. Receiving the delivery reports. There are 2 options for doing this. Opening a connection with the server and waits untill the SMSC sends a message. OR you query the SMSC with the message id. So we are only looking for a basic script so we can use a function like sendmessage(9955774411, 5511254254, "testmessage"); For the delivery reports. Query method, querymessage(Ajh5646); and answer with the status. Or with the first option that waits untill the SMSC sends a delivery report. We will write our database query in your script. Actually we aren’t searching for somebody that starts writing this script from scratch. SMPP is a universal protocol, so I hope we can buy it from someone. It is an educational project. We can pay a fee but not "the big money". Thanks !