I was walking around downtown in Seattle and found this company that makes true-to-history flannel jerseys and caps for old minor league teams : r/baseball
New Era Tacoma Rainiers 1995 59FIFTY Hat
Ebbets field flannels fitted - Gem
Bid on Ichiro's Seattle Rainiers Uniform
Ebbets Field Flannels Seattle Rainiers 1939 Cap – TGD Responsive
Rainier hat found at Fremont Vintage Mall (Seattle, WA)
Seattle Rainiers snapback hat - VintageSportsGear
Vintage Tacoma Rainiers Snapback Hat
Seattle Rainiers 1957 Vintage Ballcap
File:Seattle rainiers caplogo.svg - Wikipedia
Seattle Rainiers 1957 Vintage Ballcap Blue New 7 1/2 Hat