I had same issue. I called Pergo. They stated that they no longer sell Pergo Presto Model ph4577. It was replaced by model PH4709. According to them the change took place Sept 2006. The newer version of Red Oak Block(ed)is NOT compatible with the old in that they way they lock together is entirely different.Great business sense!!!
Anyway...I have 2 full boxes of Pergo PH4577 and part of third. Will sell the two full, you pay full shipping cost. If anyone interested I will place for sell on Ebay dependent on responses.

Joel R Hutchins

Hi...We just encountered the exact problem you described. We are in search of 2 last boxes to complete our front living room. It would be greatly appreciated for your help....What would you charge per box plus shipping to 97446? We look forward to your response! :) Todd&Ginger

We need 2 boxes of the Pergo Presto PH4577. We live at 97446. What would you charge per box? and then shipping? Thanks for your response!! Todd&Ginger

Hello,

I will buy both boxes! How much do you want for both? I can send you a postal money order for payment overnight along with an airbill for you to use to ship the boxes back to me billing my account for all shipping charges. Please let me know as soon as possible. Please email. Thanks! rgirl@verizon.com

I have 7 full boxes of Pergo Presto 4577 that I will sell for $50 each plus shipping.

I will sell these 7 full boxes of flooring for $50 each plus shipping. E-mail me at pattyannsue@hotmail.com if you are interested.

I am intrested in some of this pergo presto red oak blocked ph 4577 my email address is bigbub39@sbcglobal.net 1 or 2 boxes if possible.

All 7 boxes have been sold and shipped. Thank you for your interest.

Wanted to buy 1 box or less.

Or have boxes I would be willing to sell.

I am about 2 boxes short to finish a project. If you still have the product, how much is your selling price.

Anxiously awaiting to hear from you....S Justiss