Just wanted to update on the customer service situation at Combi. My call was not immediately returned, but the supervisor of customer relations did return my call today. He was very knowledgeable in this product (the lot from which my walker came did not include horns, as they are redesigning this item), courteous and even offered to send me a horn for my walker once he verifies it is compatible with the walker I bought. He also got my email address and promised to let me know when new items come out for this walker (apparently they are designing a new attachable toy for it, I can't wait to see it!
Very happy now with my purchase! (Right Start can give you the number to Combi's Customer Relations line if you need it.)
Combi Activity Walker Pink