NBA Finals: Ketch Design Centre has eye-catching tribute to Thunder and James Harden's beard

“I think that's what's so great about this market is that fans are so passionate.”

The shop started selling championship merchandise immediately after Wednesday's win and stayed open “until the last customer left,” which Fey said was after midnight.

He said the night was the busiest for the store since the team moved to Oklahoma City.

The store has extended its hours, staying open from 9 a.m. to 6 p.m. Monday through Saturday and from noon to 4 p.m. on Sundays through the NBA Finals.

Merchandise is also available at NBAThunderShop.com, and Fey said orders have been coming in from around the country.

Back on Western, Ketch has even bigger plans for Thunder decor.

Lamar Advertising is getting the company a large “Thunder Up” banner and a 7-foot Kevin Durant head that will be added to a large steel “Durantula” that Ketch's shop is fabricating from steel. There are also plans for some red “Sally Jesse Raphael”-style glasses like Russell Westbrook wore during postgame interviews after the Thunder beat the Lakers in Game 1 of the Western Conference Semifinals.

There are also plans for Thunder watch parties outside of the store during the NBA Finals.

“Being from Oklahoma City, we had the 89ers and Blazers and it was hard to imagine we'd have something bigger than that,” Ketch said. “It's such a different feel now, it's so national and it's everybody that's caught up in it right now.”