A faulty Oil Pump can, surprisingly quickly, trash a perfectly good engine! The safest option is to either fit a complete new unit, or take the less expensive route of refurbishing the old pump and ancillary items with as many new components required.
This part and perhaps some of those listed below may be end up in your shopping cart?
Order all the items you require at the same time, new filter 15010MCEH51 & nice new correct spec bolts 90004GHB63090021MM50009280014000957010604000 for example, and still only pay the same single fixed price shipping charge.
Please be aware that this component may have other applications within the Honda model range, so check the part-numbers you require are correct prior to ordering?