There is an interesting Malvern Star on ebay. Unfortunately, not a great deal of info. I emailed the seller and the size is 55cm. shipping? read the reply yourself below...cut and snipped.
hi that measerment is 55cm, cost to US un sure,
Item: malvern star 3 star roadstar " 1950s" ebay id: 7217953361 seller name: scarb44
Might be worth a glance for someone though.
Falls Creek, Pa