Need help finding LED strips for christmas lighting

I have a friend that would like to have warm-white led strip lighting that can do the "chaser" effect. Everything I am finding comes in 5 meter lengths. He would like much longer lengths like 20 and 50 foot lengths around 7, and 17 meters respectively.

Can anyone help with a solution to combine strips or buy bigger sections? I am in the USA but, ordering from Hong Kong is not a problem. Of course I am looking for good pricing too.

Thanks, Mark

Strips only come in 5 meter lengths. You can either solder the ends together, or buy plugs to put on the ends like these:

Thank you for the reply KirAsh4!