According to Heavy Duty Trucking magazine truck parts pricing is supposed to come down this year. According to the chart for the last two decades or so parts prices were increasing about 2% per year then in 2021 shot up to 10%. Maybe we will get some relief with bus parts as many are similar with HD trucks.
Here is the article:
https://www.truckinginfo.com/10190900/truck-parts-pricing-to-come-down-from-historic-highs (https://www.truckinginfo.com/10190900/truck-parts-pricing-to-come-down-from-historic-highs)
The prices should come down on after market parts since they made offshore OEM parts will probably increase in price lol I know Detroit Diesel OEM parts jump every day in price.