This is interesting. It sounds like Sunday were forced to change the name of their Spark complete bikes. They’re now called the Primer and Primer Jr. Here’s what they said on the site.
“We’re excited to announce the release of the Sunday Primer and Primer Jr. What is the Primer? Due to circumstances beyond our control, we’ve had to rename the Spark and Lil Spark. The Primer and Primer Jr. are the same affordable and reliable bikes, just with a new name. To celebrate this name change, we are releasing 3 new colors in two sizes. First, we have a new 21″ TT size that is offered in Matte Silver and Blue Wave colors. Next, we have a Seafoam Green in a 20.5″ TT size. Look for the new colors of the Primer and Primer Jr available starting late next week.” – Sunday