I agree with your wurly but its one of these things - when you in there you might as well change it
here is a list from when i did my 4th gen in 2012 - parts are for BB4 4th Gen. i went for the manual tensioner conversion. The autotensioner is a Honda only part.
Parts ordered so far:-
Balancer shaft retainer kit. Honda pt no.06923-POA-306. Maindealer cost £3.47
H22 water Pump&Gasket for BB4. Bellocat(Ebay) cost £38.50
H22 to H23 Manual Tensioner kit. HTune £93.48
Camshaft Oil seals - Honda pt no.91213-PR3-004 Maindealer cost £7.62x2.Size 29x43x8
Balancer belt. Honda pt no.13405-PT0-004 - Maindealer cost £38.40
Timing belt. Gates PowerGrip no.T226 (155x24) Motorfactor £35
Crankshaft pulley woodruff key.Honda pt no,.90704-PT0-000 Maindealer cost £6.91 Key size is 4.5x38.5
Balancer shaft oil seal.Honda pt no.91233-PT0-003.Maindealer cost £10.90.Size 27x40x8
Crankshaft oil seal.Honda pt no.91212-P0A-004.Maindealer cost £13.64.Size 40x52x7
3 litres super red coolant £20 - mix 50/50 with water to make 6 litres
All prices are inclusive of vat and delivery charges.
At least this should give you a starting point
