1970 wren

If Mac hasn't sold these, http://www.oldminibikes.com/forum/mini-bike-parts/28225-bird-engineering-scrub-brake-pads.html, it would be your best shot. Now and then a NOS one will pop up on eBay, but very rarely.
I saw those! They are the correct pads, jihm you dont miss much buddy and help so many members! You are an asset to the minibike community! My daughters Wren:
Has a cover and foam on the seatpan now! I have made a pretty true to the original chainguard as well, she is 6yrs old and rides it like she stole it!