Noisy pipes/vibration from cold water pipes

Yes, you can get a mini shock arrester to fit near the boiler on the cold main, but it’s more likely to be a new fill valve or new washer in your taps

Try fixing the cold water pipes

unclipped pipes, clip if you can or fit water hammer arrester, or equilibrium ball valve in wc cistern.

Hi if it’s a recently fitted combi boiler most manufacturers recommend a shock arrestor/mini expansion vessel or PRV pressure reducing valve on incoming cold so it should be fitted and you can check that yourself/boiler installer. Is your incoming cold quite high pressure? It could be a number of things loose pipes, new valve on toilet inlet, old Styles have different nozzles for high and low pressure, modern ones have inserts to deal with high/low pressure. If you believe toilet is problem you could fit a pressure reducing valve on the incoming cold to toilet yourself approx £30