Some of us in the US have extra of the original archbar trucks resulting from converting old cars to the low archbar truck for use as representing lower 2 foot gauge cars, including in conjunction with replacing the underframe with 29906. I or others might be willing to sell you a few surplus sets for a token amount plus overseas shipping.
I also see some on E-bay which may have access to better shipping rates: https://www.ebay.com/p/Bachmann-On30-Scale-Train-Arch-Bar-Freight-Trucks-29901/1600542111?iid=303239913309&chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=303239913309&targetid=595076246328&device=c&mktype=pla&googleloc=9016859&poi=&campaignid=1689407474&mkgroupid=74365777868&rlsatarget=pla-595076246328&abcId=1140476&merchantid=101510138&gclid=EAIaIQobChMI1NP40IH_4wIVCP_jBx1i-AiiEAQYByABEgJQxPD_BwE
I also see some on E-bay which may have access to better shipping rates: https://www.ebay.com/p/Bachmann-On30-Scale-Train-Arch-Bar-Freight-Trucks-29901/1600542111?iid=303239913309&chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=303239913309&targetid=595076246328&device=c&mktype=pla&googleloc=9016859&poi=&campaignid=1689407474&mkgroupid=74365777868&rlsatarget=pla-595076246328&abcId=1140476&merchantid=101510138&gclid=EAIaIQobChMI1NP40IH_4wIVCP_jBx1i-AiiEAQYByABEgJQxPD_BwE