Congratulations, theyre great boats and for a 1st time craft, perfect as theyre very forgiving!
Is she a fully working boat or have you got loads of bits missing?
The original leg switch can be obtained from Lancing marine (lancingmarine.co.uk?) although i do suspect that any heavy duty toggle switch will do - try www.indexmarine.co.uk
Depending on the boats age, the tacho may be a little difficult to find. Many of the VDO gauges are now doscontinued so depending on whether your worried about it matching in terms of looks, there are a few options....
New gauges can be bought competitively at lowtension.co.uk or originals can often be found at a boat jumble or the like.
Fuel tap can be bought at most chandlers but again, try the web! Suggest www.asapsupplies.com
Dont forget to post some pics!
What year is she?
Hope this helps